/* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % U U Y Y V V Y Y % % U U Y Y V V Y Y % % U U Y V V Y % % U U Y V V Y % % UUU Y V Y % % % % % % Read/Write 16bit/pixel Interleaved YUV Image Format. % % % % Software Design % % John Cristy % % July 1992 % % % % % % Copyright 1999-2007 ImageMagick Studio LLC, a non-profit organization % % dedicated to making software imaging solutions freely available. % % % % You may not use this file except in compliance with the License. You may % % obtain a copy of the License at % % % % http://www.imagemagick.org/script/license.php % % % % Unless required by applicable law or agreed to in writing, software % % distributed under the License is distributed on an "AS IS" BASIS, % % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. % % See the License for the specific language governing permissions and % % limitations under the License. % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % */ /* Include declarations. */ #include "magick/studio.h" #include "magick/blob.h" #include "magick/blob-private.h" #include "magick/color.h" #include "magick/colorspace.h" #include "magick/exception.h" #include "magick/exception-private.h" #include "magick/image.h" #include "magick/image-private.h" #include "magick/list.h" #include "magick/magick.h" #include "magick/memory_.h" #include "magick/monitor.h" #include "magick/quantum-private.h" #include "magick/static.h" #include "magick/string_.h" #include "magick/module.h" /* Forward declarations. */ static MagickBooleanType WriteUYVYImage(const ImageInfo *,Image *); /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e a d U Y V Y I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % ReadUYVYImage() reads an image in the UYVY format and returns it. It % allocates the memory necessary for the new Image structure and returns a % pointer to the new image. % % The format of the ReadUYVYImage method is: % % Image *ReadUYVYImage(const ImageInfo *image_info, % ExceptionInfo *exception) % % A description of each parameter follows: % % o image_info: The image info. % % o exception: return any errors or warnings in this structure. % % */ static Image *ReadUYVYImage(const ImageInfo *image_info, ExceptionInfo *exception) { Image *image; long y; MagickBooleanType status; register long x; register PixelPacket *q; register long i; unsigned char u, v, y1, y2; /* Open image file. */ assert(image_info != (const ImageInfo *) NULL); assert(image_info->signature == MagickSignature); if (image_info->debug != MagickFalse) (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s", image_info->filename); assert(exception != (ExceptionInfo *) NULL); assert(exception->signature == MagickSignature); image=AllocateImage(image_info); if ((image->columns == 0) || (image->rows == 0)) ThrowReaderException(OptionError,"MustSpecifyImageSize"); if ((image->columns % 2) != 0) image->columns++; (void) CopyMagickString(image->filename,image_info->filename,MaxTextExtent); status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); if (status == MagickFalse) return((Image *) NULL); for (i=0; i < image->offset; i++) if (ReadBlobByte(image) == EOF) { ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile", image->filename); break; } image->depth=8; if (image_info->ping != MagickFalse) { CloseBlob(image); return(GetFirstImageInList(image)); } if (SetImageExtent(image,0,0) == MagickFalse) { InheritException(exception,&image->exception); return(DestroyImageList(image)); } /* Accumulate UYVY, then unpack into two pixels. */ for (y=0; y < (long) image->rows; y++) { q=SetImagePixels(image,0,y,image->columns,1); if (q == (PixelPacket *) NULL) break; for (x=0; x < (long) (image->columns >> 1); x++) { u=(unsigned char) ReadBlobByte(image); y1=(unsigned char) ReadBlobByte(image); v=(unsigned char) ReadBlobByte(image); y2=(unsigned char) ReadBlobByte(image); q->red=ScaleCharToQuantum(y1); q->green=ScaleCharToQuantum(u); q->blue=ScaleCharToQuantum(v); q++; q->red=ScaleCharToQuantum(y2); q->green=ScaleCharToQuantum(u); q->blue=ScaleCharToQuantum(v); q++; } if (SyncImagePixels(image) == MagickFalse) break; if ((image->progress_monitor != (MagickProgressMonitor) NULL) && (QuantumTick(y,image->rows) != MagickFalse)) { status=image->progress_monitor(LoadImageTag,y,image->rows, image->client_data); if (status == MagickFalse) break; } } image->colorspace=YCbCrColorspace; if (image_info->colorspace == UndefinedColorspace) (void) SetImageColorspace(image,RGBColorspace); if (EOFBlob(image) != MagickFalse) ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile", image->filename); CloseBlob(image); return(GetFirstImageInList(image)); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e g i s t e r U Y V Y I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % RegisterUYVYImage() adds attributes for the UYVY image format to % the list of supported formats. The attributes include the image format % tag, a method to read and/or write the format, whether the format % supports the saving of more than one frame to the same file or blob, % whether the format supports native in-memory I/O, and a brief % description of the format. % % The format of the RegisterUYVYImage method is: % % unsigned long RegisterUYVYImage(void) % */ ModuleExport unsigned long RegisterUYVYImage(void) { MagickInfo *entry; entry=SetMagickInfo("PAL"); entry->decoder=(DecodeImageHandler *) ReadUYVYImage; entry->encoder=(EncodeImageHandler *) WriteUYVYImage; entry->adjoin=MagickFalse; entry->raw=MagickTrue; entry->endian_support=MagickTrue; entry->description=ConstantString("16bit/pixel interleaved YUV"); entry->module=ConstantString("UYVY"); (void) RegisterMagickInfo(entry); entry=SetMagickInfo("UYVY"); entry->decoder=(DecodeImageHandler *) ReadUYVYImage; entry->encoder=(EncodeImageHandler *) WriteUYVYImage; entry->adjoin=MagickFalse; entry->raw=MagickTrue; entry->endian_support=MagickTrue; entry->description=ConstantString("16bit/pixel interleaved YUV"); entry->module=ConstantString("UYVY"); (void) RegisterMagickInfo(entry); return(MagickImageCoderSignature); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % U n r e g i s t e r U Y V Y I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % UnregisterUYVYImage() removes format registrations made by the % UYVY module from the list of supported formats. % % The format of the UnregisterUYVYImage method is: % % UnregisterUYVYImage(void) % */ ModuleExport void UnregisterUYVYImage(void) { (void) UnregisterMagickInfo("PAL"); (void) UnregisterMagickInfo("UYVY"); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % W r i t e U Y V Y I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % WriteUYVYImage() writes an image to a file in the digital UYVY % format. This format, used by AccomWSD, is not dramatically higher quality % than the 12bit/pixel YUV format, but has better locality. % % The format of the WriteUYVYImage method is: % % MagickBooleanType WriteUYVYImage(const ImageInfo *image_info, % Image *image) % % A description of each parameter follows. % % o image_info: The image info. % % o image: The image. % Implicit assumption: number of columns is even. % */ static MagickBooleanType WriteUYVYImage(const ImageInfo *image_info, Image *image) { MagickPixelPacket pixel; Image *uyvy_image; long y; MagickBooleanType full, status; register const PixelPacket *p; register long x; /* Open output image file. */ assert(image_info != (const ImageInfo *) NULL); assert(image_info->signature == MagickSignature); assert(image != (Image *) NULL); assert(image->signature == MagickSignature); if (image->debug != MagickFalse) (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); if ((image->columns % 2) != 0) image->columns++; status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception); if (status == MagickFalse) return(status); /* Accumulate two pixels, then output. */ uyvy_image=CloneImage(image,0,0,MagickTrue,&image->exception); if (uyvy_image == (Image *) NULL) ThrowWriterException(ResourceLimitError,image->exception.reason); if (image_info->colorspace == UndefinedColorspace) (void) SetImageColorspace(uyvy_image,YCbCrColorspace); full=MagickFalse; (void) ResetMagickMemory(&pixel,0,sizeof(MagickPixelPacket)); for (y=0; y < (long) image->rows; y++) { p=AcquireImagePixels(uyvy_image,0,y,image->columns,1,&image->exception); if (p == (const PixelPacket *) NULL) break; for (x=0; x < (long) image->columns; x++) { if (full != MagickFalse) { pixel.green=(pixel.green+p->green)/2; pixel.blue=(pixel.blue+p->blue)/2; (void) WriteBlobByte(image,ScaleQuantumToChar((Quantum) pixel.green)); (void) WriteBlobByte(image,ScaleQuantumToChar((Quantum) pixel.red)); (void) WriteBlobByte(image,ScaleQuantumToChar((Quantum) pixel.blue)); (void) WriteBlobByte(image,ScaleQuantumToChar(p->red)); } pixel.red=(double) p->red; pixel.green=(double) p->green; pixel.blue=(double) p->blue; full=full == MagickFalse ? MagickTrue : MagickFalse; p++; } if ((image->progress_monitor != (MagickProgressMonitor) NULL) && (QuantumTick(y,image->rows) != MagickFalse)) { status=image->progress_monitor(SaveImageTag,y,image->rows, image->client_data); if (status == MagickFalse) break; } } uyvy_image=DestroyImage(uyvy_image); CloseBlob(image); return(MagickTrue); }